CN216956679U

CN216956679U - Developing box

Info

Publication number: CN216956679U
Application number: CN202220293186.4U
Authority: CN
Inventors: 黄林; 黄宗仟
Original assignee: Zhuhai Chaojun Technology Co ltd
Current assignee: Zhuhai Chaojun Technology Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-12
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a developing cartridge. The developing cartridge of the embodiment includes a cartridge body, a developing roller, a powder feeding roller, and a developer stirring member; the driving end of the box body is provided with a driving assembly and a side cover partially covering the driving assembly, the driving assembly comprises a driving gear, a transition gear and a stirring gear connected with the developer stirring component, the driving gear is provided with a gear part and a driving force receiving part exposed from the side cover, and the transition gear is respectively meshed with the gear part of the driving gear and the stirring gear; wherein, the drive end of box body is equipped with the support that is located the side cover inboard, follows the axial observation of drive end along the developer roll, and transition gear and stirring gear do not all overlap with the support. When the driving assembly is assembled, the transition gear and the stirring gear can be installed after the support is installed, the installation flexibility and the assembly efficiency of the transition gear and the stirring gear are improved, and the assembly condition can be conveniently checked.

Description

Developing box

Technical Field

The present invention relates to a developing cartridge.

Background

The developing cartridge may be mounted to an electrophotographic image forming apparatus such as a laser printer, a copying machine, a facsimile machine, etc., alone or after forming a process cartridge with a photosensitive drum cartridge, for supplying a developer to the photosensitive drum to develop an electrostatic latent image on the photosensitive drum. Generally, a developing cartridge includes a cartridge body, a developing roller, a powder feed roller, and a developer stirring member; the driving end of the box body is provided with a driving assembly, and the driving assembly can receive rotary driving force from the electronic photographic imaging device and further drive the developing roller, the powder feeding roller and the developer stirring component to rotate.

The related art has a developing cartridge whose driving end is provided with a holder that rotatably supports a developing roller; drive assembly includes drive gear, transition gear and the stirring gear who is connected with developer stirring component, observe along the axial of developer roll from the drive end, stirring gear and transition gear are at least partially hidden to the support, make in drive assembly's installation, need install stirring gear and transition gear earlier, then just mountable support, not only the equipment is inconvenient, low in production efficiency, and stirring gear and transition gear drop easily in assembly line circulation in-process, the installation is unstable, also can't inspect stirring gear and transition gear's installation condition after the equipment.

Disclosure of Invention

A primary object of the present invention is to provide a developing cartridge which facilitates efficient and stable assembly of a driving assembly and inspection of the assembly.

In order to achieve the above-described primary object, an embodiment of the present invention provides a developing cartridge including a cartridge body, a developing roller, a powder feed roller, and a developer stirring member; the driving end of the box body is provided with a driving assembly and a side cover for partially covering the driving assembly, the driving assembly comprises a driving gear, a transition gear and a stirring gear connected with the developer stirring member, the driving gear is provided with a gear part and a driving force receiving part exposed from the side cover, and the transition gear is respectively meshed with the gear part of the driving gear and the stirring gear; wherein, the drive end of box body is equipped with the support that is located the side cover inboard, follows the axial of drive end along the developer roll and observes, and transition gear and stirring gear do not all overlap with the support.

According to an embodiment of the present invention, at least a part of the stirring gear and the transition gear are covered by the driving gear as viewed from the driving end of the cartridge body in the axial direction of the developing roller.

According to one embodiment of the present invention, the driving assembly further comprises a powder feeding roller gear connected to the powder feeding roller and a developing roller gear connected to the developing roller; the driving gear comprises a first gear part, a second gear part and a third gear part, the second gear part is arranged on the inner side of the first gear part in the axial direction, and the third gear part is arranged on the inner side of the first gear part and the second gear part in the radial direction at intervals; the first gear part is meshed with the powder feeding roller gear, the second gear part is meshed with the developing roller gear, and the third gear part is meshed with the transition gear.

More specifically, one side of the bracket facing the side cover is provided with an annular supporting part, and a circular slot is formed between the third gear part of the driving gear and the first gear part and the second gear part; the annular supporting part is inserted into the circular slot and forms rotating fit with the driving gear.

Preferably, the outer circumferential surface and/or the inner circumferential surface of the annular support portion form an uneven structure in the circumferential direction thereof, so as to improve the structural strength of the annular support portion, thereby enhancing the reliable support of the driving gear.

According to an embodiment of the present invention, the roller shaft of the developing roller is rotatably supported at the driving end by a bracket and protrudes out of a side of the bracket facing the edge cover.

More specifically, the bracket has a first support boss protruding from an inner surface and/or an outer surface thereof, the first support boss rotatably supporting a roller shaft of the developing roller.

According to an embodiment of the present invention, the roller shaft of the powder feed roller is rotatably supported at the drive end by a bracket and protrudes out of a side of the bracket facing the edge cover.

More specifically, the holder has a second support boss protruding from an inner surface and/or an outer surface thereof, and one or more reinforcing ribs connected to the second support boss, the second support boss rotatably supporting a roller shaft of the powder feed roller.

According to an embodiment of the present invention, the bracket has a notch portion exposing the transition gear and the stirring gear, and a convex pillar connected to the side wall of the driving end of the case is disposed at a position adjacent to the notch portion on the upper portion of the bracket, so as to enhance the structural strength of the bracket and prevent the bracket from being deformed during the process of the driving gear rotating in cooperation with the annular supporting portion.

In the embodiment of the present invention, neither the transition gear nor the stirring gear overlaps the bracket and is completely exposed from the bracket as viewed from the drive end in the axial direction of the developing roller. Therefore, when the driving assembly is assembled, the bracket can be installed firstly, and then the transition gear and the stirring gear are installed, so that the flexibility and the reliability of installation of the transition gear and the stirring gear are improved, the assembling efficiency is improved, and the assembling condition of the transition gear and the stirring gear is conveniently checked.

To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a perspective view of an embodiment of a developer cartridge of the present invention;

FIG. 2 is a first exploded view of the driving end of the cartridge in one embodiment;

fig. 3 is a structural view of the developing cartridge in the embodiment after removing the driving end edge cover;

FIG. 4 is a structural view of a driving assembly in the embodiment;

FIG. 5 is a second exploded view of the driving end of the developer cartridge in the embodiment;

FIG. 6 is a side view of the embodiment with the drive end edge cap and drive gear removed;

FIG. 7 is a view showing a fitting structure of a driving gear and a bracket in the embodiment;

fig. 8 is a side view of the developer cartridge with the drive end edge cap removed in an embodiment.

Detailed Description

As shown in fig. 1, the developing cartridge of the embodiment includes a cartridge body 10 and a developing roller 20, and the developing roller 20 is used to supply a developer to a photosensitive drum during image formation to develop an electrostatic latent image on the photosensitive drum. Further, a powder feeding roller for stirring and conveying the developer accommodated in the cartridge body 10 to the powder feeding roller for adhering the developer to the surface of the developing roller 20 and a developer stirring member (not visible in the drawing) are provided in the cartridge body 10.

The driving end of the case 10 is provided with a driving assembly 30 and a cap 40 partially covering the driving assembly 30. As shown in fig. 2, a plurality of fasteners 42 are provided on the edge cap 40, and the fasteners 42 form a snap fit with the driving end of the case body 10, so that the edge cap 40 is connected to the driving end of the case body 10. Further, the edge cap 40 may be fixed to the driving end of the case body 10 by the screw 44, improving the reliability of the installation of the edge cap 40.

The driving assembly 30 is for receiving a rotational driving force from the electrophotographic image forming apparatus, thereby driving the developing roller 20, the powder feed roller, and the developer stirring member to rotate. As shown in fig. 3 and 4, the driving assembly 30 includes a driving gear 31, a developing roller gear 32, a powder feeding roller gear 33, an agitating gear 34, and a transition gear 35; the developing roller gear 32 is connected to the rotation shaft of the developing roller 20, the powder feeding roller gear 33 is connected to the rotation shaft of the powder feeding roller, and the stirring gear 34 is connected to the rotation shaft of the developer stirring member. As shown in fig. 3, at least a part of the stirring gear 34 and the transition gear 35 are covered by the drive gear 31 as viewed from the drive end in the axial direction of the developing roller 10. Further, as shown in fig. 2, the inner side of the side cover 40 is provided with an abutment column 43, and the abutment column 43 may abut against the axially outer end of the agitation gear 34 to more accurately define the axially installed position of the agitation gear 34.

As shown in fig. 4, the drive gear 31 may have an integrally molded structure including a driving force receiving part 314, a first gear part 311, a second gear part 312, and a third gear part 313. Wherein, the second gear part 312 is disposed at the axial inner side of the first gear part 311 (i.e. the side close to the box body 10), and the third gear part 313 is disposed at the radial inner side of the first gear part 311 and the second gear part 312 at intervals; the first gear portion 311 is engaged with the powder feeding roller gear 33, the second gear portion 312 is engaged with the developing roller gear 32, the third gear portion 313 is engaged with the transition gear 35, and the stirring gear 34 is engaged with the transition gear 35. As shown in fig. 5, a driving force receiving portion 314 is exposed from the driving sheath 41 of the edge cover 40 for receiving a rotational driving force from the electrophotographic image forming apparatus, thereby driving the developing roller 20, the powder feeding roller, and the developer stirring member to rotate. Alternatively, the driving force receiving portion 314 of the driving gear 31 may be assembled and connected with the gear portion thereof.

As shown in fig. 5, the driving end of the case body 10 is further provided with a bracket 50 inside the edge cover 40. The edge cover 40 at least partially covers the bracket 50 as viewed from the driving end in the axial direction of the developing roller 20, for preventing the bracket 50 from being struck by scratches. As shown in fig. 6, the bracket 50 is provided with a notch portion 51 and an annular support portion 52, and the notch portion 51 can communicate with the inner cavity of the annular support portion 52; both the transition gear 35 and the agitation gear 34 are exposed from the notched portion 51 so as not to overlap the bracket 50, as viewed from the driving end of the cartridge body 10 in the axial direction of the developing roller 10. So set up, when assembling drive assembly 30, can be at first installing support 50, then install transition gear 35 and stirring gear 34 again, improve the flexibility and the reliability of transition gear 35 and stirring gear 34 installation, improve assembly efficiency, and conveniently inspect the assembly condition of transition gear 35 and stirring gear 34.

As shown in fig. 5, the roller shaft 21 of the developing roller 20 is rotatably supported at the driving end by the bracket 50 and protrudes out of the side of the bracket 50 facing the edge cover 40; the developing roller gear 32 is located on a side of the bracket 50 facing the edge cover 40, and is coupled to the roller shaft 21 of the developing roller 20. In an alternative embodiment, as shown in fig. 7, the bracket 50 has a first supporting sleeve 53 protruding from an inner surface and/or an outer surface (a surface facing the edge cover 40) thereof, and the first supporting sleeve 53 rotatably supports the roller shaft 21 of the developing roller 20 to enhance the supporting strength of the bracket 50 to the developing roller 20, thereby improving the rotational stability of the developing roller 20 and ensuring the printing quality.

The roller shaft 71 of the powder feed roller may also be rotatably supported by the bracket 50 at the driving end and protrude out of the side of the bracket 50 facing the edge cover 40; the powder feeding roller gear 33 is located on the side of the bracket 50 facing the edge cover 40 and is connected to a roller shaft 71 of the powder feeding roller. In an alternative embodiment, as shown in fig. 7, the bracket 50 has a second supporting shaft sleeve 54 protruding from the inner surface and/or the outer surface of the bracket, and the second supporting shaft sleeve 54 rotatably supports a roller shaft 71 of the powder feeding roller, so as to enhance the supporting strength of the bracket 50 to the powder feeding roller, further improve the rotational stability of the powder feeding roller and ensure the printing quality. Further, the bracket 50 may have one or more reinforcing ribs 541 connected with the second support sleeve 54 to reinforce the structural strength of the second support sleeve 54.

With reference to fig. 7, a circular slot 315 is formed between the third gear portion 313 of the driving gear 31 and the first gear portion 311 and the second gear portion 312; the side of the bracket 50 facing the side cover 40 is provided with an annular support part 52, and the annular support part 52 is inserted into the circular slot 315 and forms a rotating fit with the driving gear 31. That is, the first gear part 311 and the second gear part 312 are rotatably fitted around the radial outside of the annular support portion 52, and the third gear part 313 is disposed on the radial inside of the annular support portion 52.

As shown in fig. 7, the outer circumferential surface and/or the inner circumferential surface of the annular support portion 52 may be formed with a concavo-convex structure 521 provided along the circumferential direction thereof for improving the structural strength of the annular support portion 52, thereby enhancing the reliable support of the drive gear 31. In an alternative embodiment, as shown in fig. 6, the concavo-convex structure 521 is formed on the outer circumferential surface of the annular supporting portion 52 and has a substantially wave-shaped structure, but the present invention is not limited thereto. Further, a convex pillar 55 may be disposed at a position adjacent to the notch 51 on an upper portion (with reference to the orientation shown in fig. 7) of the bracket 50, and the convex pillar 55 is connected to a side wall of the driving end of the box 10, so as to enhance the structural strength of the bracket 50 and prevent the bracket 50 from deforming during the process of the driving gear 31 and the annular supporting portion 52 rotating in a matching manner.

In the embodiment of the present invention, as shown in fig. 7, a plurality of fasteners 56 are disposed on the bracket 50, and the fasteners 56 form a fastening connection with the driving end of the box body 10 to fix the bracket 50 at the driving end of the box body 10. Alternatively, the bracket 50 may be fixed to the driving end of the case body 10 by a screw.

Further, the driving end of the box body 10 is also provided with a detection component. As shown in fig. 8, the detecting member includes a transmission gear 61 engaged with the stirring gear 34 and a rotating member 62, a supporting shaft 102 is provided on a side wall of the driving end of the case body 10, and the rotating member 62 is rotatably mounted on the supporting shaft 102. The transmission gear 61 is provided with two abutting protrusions 611, and the rotating member 62 is provided with two force receiving parts 621, two detected parts 622 and an elastic positioning part 623; in the initial state, the elastic positioning portion 623 engages with the positioning groove 101 on the side wall of the driving end to position the rotary member 62 at the initial position; at the time of detection of the developing cartridge, with the orientation shown in fig. 8 as a reference, the stirring gear 34 drives the transmission gear 61 to rotate counterclockwise, at this time, the abutting protrusion 611 applies a force to the force receiving portion 621 of the rotating member 62, so as to drive the rotating member 62 to rotate clockwise around the supporting shaft 102, and the detected portion 622 is detected by the detecting portion of the electrophotographic image forming apparatus during the rotation, so that the electrophotographic image forming apparatus recognizes information related to the developing cartridge (for example, whether the developing cartridge is new or old).

Although the present invention has been described above by way of examples, it should be understood that the above examples are merely illustrative of possible embodiments of the present invention and should not be construed as limiting the scope of the present invention, i.e., equivalent substitutions or changes made by those skilled in the art in light of the present invention should also be covered by the scope of the appended claims.

Claims

1. A developing cartridge includes a cartridge body, a developing roller, a powder feed roller, and a developer stirring member; the driving end of the box body is provided with a driving assembly and a side cover partially covering the driving assembly, the driving assembly comprises a driving gear, a transition gear and a stirring gear connected with the developer stirring component, the driving gear is provided with a gear part and a driving force receiving part exposed from the side cover, and the transition gear is respectively meshed with the gear part of the driving gear and the stirring gear; the method is characterized in that: the driving end of the box body is provided with a support located on the inner side of the side cover, and the transition gear and the stirring gear are not overlapped with the support when the driving end is observed along the axial direction of the developing roller.

2. A developing cartridge according to claim 1, wherein: at least a part of the stirring gear and the transition gear are covered by the drive gear as viewed from the drive end in the axial direction of the developing roller.

3. A developing cartridge according to claim 1, wherein: the driving assembly further comprises a powder feeding roller gear connected with the powder feeding roller and a developing roller gear connected with the developing roller; the driving gear comprises a first gear part, a second gear part and a third gear part, the second gear part is arranged on the inner side of the first gear part in the axial direction, and the third gear part is arranged on the inner side of the first gear part and the second gear part in the radial direction at intervals; the first gear part is meshed with the powder feeding roller gear, the second gear part is meshed with the developing roller gear, and the third gear part is meshed with the transition gear.

4. A developing cartridge according to claim 3, wherein: an annular supporting part is arranged on one side, facing the side cover, of the bracket, and a circular slot is formed between the third gear part and the first gear part and between the third gear part and the second gear part; the annular supporting part is inserted into the circular slot and forms rotating fit with the driving gear.

5. A developing cartridge according to claim 4, wherein: the outer circumferential surface and/or the inner circumferential surface of the annular support portion forms an uneven structure in the circumferential direction thereof.

6. A developing cartridge according to claim 1, wherein: the roller shaft of the developing roller is rotatably supported by the bracket at the driving end and protrudes out of a side of the bracket facing the side cover.

7. A developing cartridge according to claim 6, wherein: the bracket is provided with a first supporting shaft sleeve protruding on the inner surface and/or the outer surface of the bracket, and the first supporting shaft sleeve can rotatably support a roller shaft of the developing roller.

8. A developing cartridge according to claim 1, wherein: the roller shaft of the powder feeding roller is rotatably supported by the bracket at the driving end and protrudes out of one side of the bracket facing the side cover.

9. A developing cartridge according to claim 8, wherein: the bracket is provided with a second supporting shaft sleeve protruding out of the inner surface and/or the outer surface of the bracket and one or more reinforcing ribs connected with the second supporting shaft sleeve, and the second supporting shaft sleeve can rotatably support the roller shaft of the powder feeding roller.

10. A developing cartridge according to claim 1, wherein: the support has expose the transition gear with the breach portion of stirring gear, support upper portion adjacent to the position of breach portion is equipped with the projection that the drive end lateral wall of box body is connected.